Loading WADs using D-Touch on Android

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So i just bought a copy of D-Touch (A DOOM Source port for Android ) and downloaded it on my tablet and i was wondering how can i load wads ?
Should i type */sdcard/blabla.wad* or *-file /sdcard/blabla.wad* or something else ?? Both of those above didn't work ..
EDIT : i'm not talking about loading IWADs, it's PWADs since the applocation already offers a quick iwad selection option